[LLVMdev] make check-all failing 18 tests with --enable-optimized

[Hal Finkel]

On Tue, 2011-12-13 at 08:23 -0800, Brendan Kirby wrote:
> On 12/13/11 01:09, Eli Friedman wrote:
> > On Mon, Dec 12, 2011 at 6:26 PM, Brendan Kirby <bkirby at mips.com> wrote:
> >> As part of our automated testing, I'm running make check-all to watch
> >> for failures.  One of my builds uses the --enable-optimized option to
> >> configure. When I build the latest trunk, I'm now seeing 18 failing
> >> tests:
> >>    Clang :: Preprocessor/macro_paste_c_block_comment.c
> >>    LLVM :: CodeGen/ARM/2011-05-04-MultipleLandingPadSuccs.ll
> >>    LLVM :: CodeGen/ARM/2011-11-14-EarlyClobber.ll
> >>    LLVM :: CodeGen/ARM/lsr-unfolded-offset.ll
> >>    LLVM :: CodeGen/Generic/2003-05-28-ManyArgs.ll
> >>    LLVM :: CodeGen/Generic/print-arith-fp.ll
> >>    LLVM :: CodeGen/Thumb/2009-08-20-ISelBug.ll
> >>    LLVM :: CodeGen/Thumb/asmprinter-bug.ll
> >>    LLVM :: CodeGen/X86/2006-10-13-CycleInDAG.ll
> >>    LLVM :: CodeGen/X86/2008-02-08-LoadFoldingBug.ll
> >>    LLVM :: CodeGen/X86/2009-09-10-SpillComments.ll
> >>    LLVM :: CodeGen/X86/2010-02-19-TailCallRetAddrBug.ll
> >>    LLVM :: CodeGen/X86/2010-04-13-AnalyzeBranchCrash.ll
> >>    LLVM :: CodeGen/X86/2011-10-11-SpillDead.ll
> >>    LLVM :: CodeGen/X86/2011-10-12-MachineCSE.ll
> >>    LLVM :: CodeGen/X86/2011-11-09-FoldImpDefs.ll
> >>    LLVM :: CodeGen/X86/Atomics-64.ll
> >>    LLVM :: CodeGen/X86/fold-pcmpeqd-2.ll
> >>
> >> 17 of these tests started failing with the commit r145975, "First chunk
> >> of MachineInstr bundle support." on 12/6/2011.  I've verified that the
> >> tests pass with commit r145974.
> >>
> >> The build is running on a CentOS 5.6 machine with gcc version 4.1.2.
> > http://llvm.org/docs/GettingStarted.html#brokengcc
> >
> > -Eli
> 
> It's strange that this had been working up until commit r145975, then. 
> Any idea what that commit would have changed to break the tests again?

FWIW, that commit also completely broke compiling clang on PPC with gcc
4.1.2, even at -O1 (which used to be okay). Using newer versions of gcc
work, however, and it definitely looks like a compiler bug in 4.1.2.

 -Hal

> 
> Brendan
> 
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev

-- 
Hal Finkel
Postdoctoral Appointee
Leadership Computing Facility
Argonne National Laboratory